Use vdrsync to extract the audio track and lame to transcode it: vdrsync.pl -audio-only /path/to/recording/ lame --mp2input vdrsync0.mpa recording.mp3
Thank you, I'm experimenting with the conversion. I'd like to boost the recorded volume a bit, since it's really low and listening to the file with an MP3 player is almost impossible.
Any idea ?
Francesco
mc8647tv@mclink.it wrote:
Thank you, I'm experimenting with the conversion. I'd like to boost the recorded volume a bit, since it's really low and listening to the file with an MP3 player is almost impossible.
Any idea ?
For a simple scaling, see "lame --scale". This will make things louder but may cause clipping.
To get something better you may need to use an automatic gain control (e.g. see "agc" on http://aaron.boim.com/unix/audioRecording.html) or some dynamic range compression (e.g. "sox --compand ..." http://sox.sourceforge.net/ ). You'll need to experiment to see what works best for you. If you want a GUI tool, try audacity http://audacity.sourceforge.net/
Jon
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Jon Burgess -
mc8647tv＠mclink.it